#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#define SOCKET_PATH    "/tmp/socket.domain"
#define MSG_STR        "Hello, Unix Domain Socket Server!"

int main(int argc, char **argv)
{
	int                   conn_fd = -1;
	int                   rv = -1; 
	char                  buf[1024];
	struct sockaddr_un    serv_addr;

	conn_fd = socket(AF_UNIX, SOCK_STREAM, 0);

	if(conn_fd < 0)
	{
		printf("create socket failure: %s\n", strerror(errno));
		return -1;
	}

	memset(&serv_addr, 0, sizeof(serv_addr));
	serv_addr.sun_family=AF_UNIX;
	strncpy(serv_addr.sun_path, SOCKET_PATH, sizeof(serv_addr.sun_path)-1);

	if( connect(conn_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
	{
		printf("connect to unix domain socket server on \"%s\" failure: %s\n", SOCKET_PATH, strerror(errno));
		return 0;
	}
	printf("connect to unix domain socket server on \"%s\" ok\n", SOCKET_PATH);

	if( write(conn_fd, MSG_STR, strlen(MSG_STR)) < 0 )
	{
		printf("write data to unix domain socket server on \"%s\" failure: %s\n", SOCKET_PATH, strerror(errno));
		goto cleanup;
	}
		     
	memset(buf, 0, sizeof(buf));
	rv = read(conn_fd, buf, sizeof(buf)); 
	if(rv < 0)
	{
		printf("Read data from server failure: %s\n", strerror(errno));
		goto cleanup;
	}
	else if( 0 == rv )
	{
		printf("Client connect to server get disconnected\n");
		goto cleanup;
	}
	printf("Read %d bytes data from server: '%s'\n", rv, buf);
cleanup:
	close(conn_fd);
}

